Holger Heidkamp updated the documentation for the nextcloud/deck repository to accurately reflect the current state of mobile app availability, focusing on the transition from the previous iOS app to the newly released Next Deck app. Using Markdown and leveraging strong documentation skills, Holger revised the README to clarify onboarding for mobile users and reduce confusion about supported platforms. The work involved a targeted, single-commit change that aligned messaging with recent product releases, ensuring users have up-to-date information. While the scope was limited to documentation, the update demonstrated careful change management and attention to detail in maintaining user-facing technical content.